<template>
  <div class="xtx-infinite-loading" ref="target">
    <div class="loading" v-if="loading">
      <span class="img"></span>
      <span class="text">正在加载...</span>
    </div>
    <div class="none" v-if="finished">
      <span class="img"></span>
      <span class="text">亲，没有更多了</span>
    </div>
  </div>
</template>
<script setup >
import { useIntersectionObserver } from '@vueuse/core';
import { ref } from 'vue';

const props = defineProps({
  loading: {
    type: Boolean,
    default: false
  },
  finished: {
    type: Boolean,
    default: false
  }
})
const target = ref()
const emit = defineEmits(["infinite"])
useIntersectionObserver(target,
  ([{ isIntersecting }]) => {
    if (isIntersecting) {
      if (!props.finished && !props.loading) {
        emit("infinite")
      }
    }

  },
  { threshold: 0 })

</script>
<style scoped lang="less">
.xtx-infinite-loading {
  .loading {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 200px;

    .img {
      width: 50px;
      height: 50px;
      background: url(~@/assets/img/load.gif) no-repeat center / contain;
    }

    .text {
      color: #999;
      font-size: 16px;
    }
  }

  .none {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 200px;

    .img {
      width: 200px;
      height: 134px;
      background: url(~@/assets/img/none.png) no-repeat center / contain;
    }

    .text {
      color: #999;
      font-size: 16px;
    }
  }
}
</style>
